3939897 has 24 divisors (see below), whose sum is σ = 6002400. Its totient is φ = 2291328.

The previous prime is 3939851. The next prime is 3939899. The reversal of 3939897 is 7989393.

It is not a de Polignac number, because 3939897 - 2⁷ = 3939769 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3939899) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9429 + ... + 9837.

It is an arithmetic number, because the mean of its divisors is an integer number (250100).

Almost surely, 2^3939897 is an apocalyptic number.

It is an amenable number.

3939897 is a deficient number, since it is larger than the sum of its proper divisors (2062503).

3939897 is a wasteful number, since it uses less digits than its factorization.

3939897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 457 (or 444 counting only the distinct ones).

The product of its digits is 367416, while the sum is 48.

The square root of 3939897 is about 1984.9173786332. The cubic root of 3939897 is about 157.9410264339.

The spelling of 3939897 in words is "three million, nine hundred thirty-nine thousand, eight hundred ninety-seven".